Rhino license manager initialization failed with error -200. Rhino will not run

Rhino Rhino for Windows
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2

try repairing your vc runtime and your .net

1st - vc runtime here-:

https://aka.ms/vs/16/release/vc_redist.x64.exe

restart and try rhino-

no luck?

then repair your .net.
https://aka.ms/DotnetRepairTool